Adding and listing machine



March 12, 1929.

O. J. SUNDSTRAND ADDING Ann us'rme mamas" Filed Oct. 1 ,1924;jz'sheets-speet 1 I InvawiEfi OacanI fiandlstmnd; 0, M M w a March121.1929? 0. J. SUNDSTRAND 0 72 ADDING 1mm LISTING mourns Filed 06.13,1924- 2 Sheets-She 17111611767: 05mm]. flund/atrand,

Patented Mar. 12,- 1929.

UNITED STATES PATENT OFFICE.

OSCAR J. SUNDSTRAND, OF ROCKFORD, ILLINOIS, ASSIErNOR, BY MESNEASSIGNMENTS, TO SUNDSTRANB CORPORATION, OF WILMINGTON, DELAWARE, ACORPORATION OF DELAWARE.

ADDING AND LISTING MACHINE.

Application filed October 13, 1924. Serial No. 743,188.

This invention relates to adding and listing machines, and moreparticularly to those.

in which the paper support need not be laterally movable.

The invention is applicable to adding machines of various types, but forconvenience in pointing out the improvements efi'ected thereby I shallherein compare a machine embodying the invention with a .machine of thetype shown in the Sundstrand Patent No. 1,198,487 illustrating the wellknown Sundstrand adding machine.

The mechanism of the Sundstrand adding machine is mounted upon a,cast-metal base and is enclosed within a case, the lower edge of whichrests upon the base, the case being secured to the base by means of twoscrews. The paper carriage issupported upon the framework of themechanism and is structurally distinct from the case.' The case iseither a sand-mold casting or a die casting.

' The casing and the edge of the base are I polished and enameled. Thelower edge of the case must be machined so that it may make propercontact with the base.

The present invention has for its object to reduce the cost ofmanufacture by substituting for the cast-metal case and the structurallydistinct paper carriage a unitary sheetmetal case and built-in papercarriage, that is to say, a sheet-metal case in and upon which all ofthe essential parts of the paper carriage are mounted, the. wholeforming a relatively inexpensive unit which may be easily' and quicklyapplied to and removed from the mechanism. The advantages accruing fromthe invention will be more fully pointed out in connection with thefollowing detailed description of the present embodiment.

In the accompanying drawings, Figure 1 is a perspective view of anadding andlisting machine embodying the features of my invention.

Fig. 2 is a fragmentary rear end elevation.

Fig. the a side elevation with parts broken :away.

1 denotes a cast-metal base on which the mechanism of the machine ismounted. Two brackets 2 are secured to the base in spaced parallelrelation and serve to support some of the mechanism.

The case 3 consists of a drawn sheet-metal stamping, the side walls 1and 5, the verheretofore used.

It has heretofore been the custom to provide an opening in the top wallto receive a glass plate bearing a series of numerals behind which thedigit-indicating pointer traveled as an item was set up. To elimi natethe cost of the glass plate an expense of securing it in place, Isubstitute a depressed panel 10 integral with the case 3 and of propersize to receive the usual decalcomania transfer 11. In the panel 10 is ahorizontal, transverse slot 12 through which the end of thedigit-indicating pointer 13 is visible. In the side wall 4 is avertically elongated opening 14: through which projects the stub shafton which the hub 15 of the operating handle 16 is removably mounted.

The paper-supporting and feeding means includes a platen 17 rotatablymounted in a rigid frame 18 consisting of two end plates rigidity to thecarriage.

The case 3 with the attached paper-supporting means 18 is removablysecured in place by means of two screws 24 extending through the frontend wall 6 into the front end of the basel, and by means of two screws25 which extend through openings in the end plates 19 and the side walls4 and 5 into holes in the ends of a bar 26 that is secured rigidly tothe brackets 2 and extends transversely o the machine near the rear thefact that the paper-supporting frame 18 is attached to the bar 26 andhence to the interior framework that supports the printing and addingmechanisms. Drawn sheetmetal cases are apt to vary somewhat, due

to warping and other causes; but such variations in the case do notaffect the position of the platen, notwithstanding the fact that thecase and the frame 18 are secured together and constitute a unit,because said unit is secured to the interior framework at pointsrelatively close to the printing mechanism.

The paper knife or tearing plate 27 is of ordinary form except that itis shortened to be within the planes of the side walls 4 and '5 so asnot to interfere with removal of the case. The paper knife is secured tothe interior framework in the usual manner.

The cover 28 for the ribbon spools may be of common form and attached tothe case by screws 29, as usual.

The improved construction herein described reduces the cost of the wholemachine about twenty per centum, and effects a further economy inreducing the stock kept 011 hand, as cases and paper carriagesnecessarily correspond in number.

While I have described the present embodiment of the invention inconsiderable detail, it will be understood that the invention is notlimited to all such details, but that, on the contrary, it is applicableto adding and listing machines of various types and shapes, the scope ofthe invention being defined in the appended claims.

I claim as my invention:

1. An adding and listing machine comprising a metal base, a unitaryremovable sheet metal case, paper supporting means removable with thecase including two end plates secured to said case, a platen carried bysaid end plates, and means for securing the case to said base arrangedalso to secure the end plates to the case.

2. An adding and listin machine having, in combination, a removableenclosing-case comprising opposite side walls, and papersupporting meansincluding two end plates rigidly secured to opposite side walls of saidcase, and a platen carried by said end plates.

In testimony whereof, I have hereunto affixed my signature.

OSCAR J. SUNDSTRAND.

